Hi everyone I have recently acquired a Roland VP540. I don’t have a lot of history about it. But had some time on my hands so thought I’d see if I could get it up and running. It had sat for a while with ink in so the lines & heads were dried up. I have changed dampers, captops, and partially unblocked the heads. Black, cyan & yellow are now firing but with A few dropouts so far from perfect but much better. I can syringe magenta through the head with no air leaks, however when I try to print magenta I have nothing. Can anyone advise me on a possible cause?